Question: I want to track the activity of my customize link sent via email or on chat to my customer.

Activities like:
Whether they opened the link or not?
How much time they were on page?

examples:
I have decided to sent business proposal link to Mr.ABC and Mr.XYZ.
So, for ABC, the link would be like: www.mycompany.com/proposal ….abc…
So, for XYZ, the link would be like: www.mycompany.com/proposal ….xyz…

It’s like a link analytic.
How to go ahead with it?

Answer: Is there anything that prevents you from using Google analytics? It’s actually free, and you can easily embed it into your website. This will track any pages that are open and time spent on page and so on.